Lava Creek Tuff
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The Lava Creek Tuff is a voluminous sheet of ash-flow tuff located in Wyoming, Montana and Idaho, United States. It was created during the Lava Creek eruption around 640,000 years ago, which led to th
Tuff Cliff showing the Lava Creek Tuff formation
Extent of the Lava Creek ash bed
Yellowstone National Park
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Yellowstone National Park is a national park of the United States located mainly in the northwest corner of the state of Wyoming, with small portions extending into Montana and Idaho. The park is know
Lava Creek Tuff
…the United States and Wascana Creek ash in Canada. The thick tuff formation resulting from this eruption is well-exposed at various locations within Yellowstone National Park, including Tuff Cliff along the Gibbon River, Virginia Cascade, and along U.S. Highway 20. Lava Creek Tuff ranges in color from light gray to pale red…
Grand Canyon of the Yellowstone
Exposed rock at Obsidian Cliff
Colter's Hell near Cody, Wyoming, one of the first geothermal sites to be spotted by mountain men
Hayden Geological Survey at Yellowstone Lake. Illustration by William Henry Jackson, 1871